Radiator



Se'pt. 28, 1937. F, w, HVQSLEF 2,094,172

I RADIATOR Filed Mar oh 25, 1955 v INVENTOR Patented Sept. 28, 1937 thereof,

My invention relates to improvements in radiator units of a type wherein a plurality of thin metal fins are integrally united to a central, hollow cast metal core portion during the casting and the objects of my invention are, provide a method of manufacturing such a radiator whereby the fins are integrally united with the core portion during the castin second, to provide meansfor preventing the warpand deformation of the fins during the castoling of the core portion; the core by ing and subsequent co and third, to prevent cracking of the aforesaid warping of t I attain these objects by in the accompanying drawing, is a top plan view of the radiator, Fi elevation of an end portion of the radiator, partly in section; Fig. 3 is an end elevation of the radiator showing the construction of the fins, and Fig. 4 is a sectional View taken along the line li of Fig. 1.

Similar numerals refer to throughout the several views.

In the drawing the numeral central portion or core, f portion or cavity 2 a for steam or other portions of the cor as at 3 and provided with the her ,to receive a connecting nipple whereby connection may be made to a supply pipe for the heat- 0 a header which'in turn has to the heating medium. It larly where hot water is to to provide the core with second bore 5 likewise adapted to receive a connecting nipple whereby a 0 may be established through the cavity 2. be understood that the bores 4 and 5 are prot each end of the unit and that, if deunits may be connected end the means illustrated in which Figure l g. 2 is a side I indicates the ormed with the hollow d to serve as a conduit heating medium. The end e l are preferably enlarged e 4 adapted ing medium or t a supply connection F is desirable, particu be the heating medium,

irculating connection sired, any number of to end by means of nipples.

A plurality of fins 6, preferably stamped from r sheet metal, and having a flat body portion, are integrally attached to the core I during the casting thereof in the following manner. are formed with a central upwardly extending slot 1 whereby the fin is bifurcated for a portion ent to the height of the core I. wer than the width laced in the mold trude into the mold firmly welded into ch extends to cover the port 1 as shown-by the dotted nearly equival The slot 1 is somewhat narro of the core I, so that when p for the core I the fins pro d upon casting are the molten metal whi tion adjacent the S10 UNITED STATES PATENT OFFIQE RADIATOR Fredrik W. Hvoslef, Kohler, Wis. Application March 25, 1935, Serial No. 12,940 12 Claims. (01. 22-403) line of Figure 4. As shown in Fig. 2, a number of the fins are relatively short-to accommodate the enlarged portions 3 of the cores.

However, the expansion and contraction of the casting during the pouring and subsequent cool- 5 ing of the casting places severe stresses upon the fins and tends to buckle or deform them, a difficulty which has heretofore rendered this method of forming a radiator impracticable. An important feature of my invention is the provi- '10 sion of means for preventing the deformation of the fins during casting and cooling.

To this end I provide a novel configuration of the fins 6 as follows. The fins 6 are provided with a second slot 8 which joins the slot 1 at 15 one end and extends upwardly to a point'near the top of the fin. The fin 6 is also notched or indented as at 9 at points equidistant the slot 8,

a point approximately even with the slot 8 but 0 leaving a pair of narrow spans l0 between the slot 8 and the indentations 9. There is thus formed the tongue I I between the indentations 9 and joined to the body of the fin only by narrow spans it).

With this construction it will be found that any stress upon the fin will be transmitted to the tongue II and will cause bending thereof, and that the yielding of this tongue relieves the strain sufficiently to prevent bending or deformation of the fin proper, and also to prevent cracking of the core casting due to the strain placed thereon by the deformation of the fins. To facilitate this action the tongues 9 are preferably bent slight- 1y from the vertical before being placed in the mold as shown in Figures 1 and 2. Upon casting, thebending or deforming of the tongues will continue in the direction in which they are originally bent, thus by placing the fins in the mold so that 40 bending of the tongues does not detract from the appearance of the unit.

The fins 6 are preferably provided with flanges i2 bent at approximately right angles thereto and extending practically to the next fin, thus the unit forms in effect a closed conduit for the passage of air therethrough past the core l and the fins 6.

The end portions 3 of the core I may be provided with a downwardly extending flange l3 drilled at M to receive a bolt for attaching the unit to a header or to another unit. The slot 8 is preferably elliptical in form to allow the passage therethrough of a draw rod for the same purpose,

I prefer to form the core I of cast iron and the fins 6 of sheet iron or steel, but any suitable material may be used.

The radiator unit as thus constructed is cheap, durable, of high thermal efficiency and much lighter in weight than an equivalent amount of the ordinary tube style radiation. On account of its high efficiency and the relatively small space required for its installation it is particularly adapted to installation in recesses in the walls, concealed radiation and forced ventilation heating systems.

It will be obvious that units of this type may be used for cooling as well as heating purposes by circulating a cooling instead of a heating medium therethrough.

I claim:

1. In a radiator, the combination of a cast metal core having a conduit forming hollow therein and a plurality of fin members integrally united therewith during the casting thereof, said fin members comprising a substantially fiat body portion, a pair of indentations therein, a deformable tongue between said indentations, and a slot positioned at the base of said tongue and adjacent an extremity of said core.

2. In a radiator, the combination of a cast metal core having a conduit forming hollow therein and a plurality of fin members integrally united therewith during the casting thereof, said fin members comprising a substantially flat body portion, a pair of indentations therein, a tongue deformable upon strain on said body portion and positioned between said indentations, said tongue being bent slightly from the plane of said body portion whereby to influence the direction of the aforesaid deformation of the tongue, and a slot positioned at the base of said tongue and adjacent an extremity of said core.

3. A fin adapted to be integrally united with a cast metal core during the casting thereof to form a radiator, said fin comprising a body portion and a deformable tongue attached to said body portion by a plurality of relatively narrow spans, V

4. A fin adapted to be integrally united with a cast metal core during the casting thereof to form a radiator, said fin comprising a body portion and a tongue deformable upon strain on said portion and attached to said body portion by a plurality of relatively narrow spans and bent slightly from the plane of said body'portion whereby to aid the aforesaid deformation and infiuence the direction thereof. 7

5. In a radiator, the combination of a cast metal core, a conduit therein and a plurality of fin members, said fin members comprising a body portion integrally united with said core and a portion attached to said body by relatively narrow spans and deformable upon thermal expansion or contraction of said core prior to the occurrence of any deformation of said body portion.

6. A fin for a heat exchange device comprising a substantially fiat body portion and a tongue attached thereto and deformable upon strain on said body portion, said tongue being bent from the plane of said body portion at an angle acute thereto.

7. A fin for a heat exchange device comprising a body portion, a slot therein adapted to receive the core of a heat exchange device, a pair of indentations in one edge of said body portion, a tongue formed therebetween, and a second slot in said body portion between said first mentioned slot and the base of said tongue.

8. A fin for a heat exchange device comprising a body portion, a slot therein adapted to re ,ceive the core of a heat exchange device, a pair of indentations in one edge of said body portion,

a tongue formed therebetween and bent slightly from the plane of said body portion to aid deformation of said tongue upon strain on said body portion, and a second slot in said body portion between said first mentioned slot and the base of said tongue.

9. A radiator fin comprising a substantially fiat body portion provided with a radiator core receiving slot, a tongue attached to said body portion by relatively narrow spans, and a second slot in said body member between said first mentioned slot and the base of said tongue.

10. A radiator fin comprising a substantially flat body portion provided with a radiator core receiving slot, a tongue attached to said body portion and deformable upon strain on said body portion, and a second slot in said body member, said second slot extending between said first mentioned slot and the base of said tongue.

11. The method of forming a sheet and cast metal structure which comprises placing a plurality of sheet metal members in a mold, casting a core portion of cast metal thereon whereby to weld said sheet metal members to said core portion during the casting thereof, said sheet metal members protruding beyond said core portion, and preventing the deformation of the main or body portion of said sheet metal members by the stresses set up by expansion and contraction during casting by providing the protruding portion of'each of said sheet metal members with a portion more easily deformable upon strain on said sheet metal member than the rest of said sheet metal member said deformable portion being positioned adjacent the outer edge of said sheet metal member.

12. The method of forming a sheet and cast metal structure which comprises placing a plurality of sheet metal members in a mold, casting a core portion of cast metal thereupon and relieving the strain on said sheet metal members and preventing deformation thereof by the stresses occasioned during casting by providing the protruding portion of said sheet metal members With a portion deformable upon stress on said sheet metal member prior to the deformation of the body portion of said member and partially deforming said deformable portion from the plane of said sheet metal member prior to said casting operation said deformable portion being positioned adjacent the outer edge of said sheet metal member,

FREDRIK W. I-IVOSLEF. 

